Possible Clues:

• Oriental sort of bean these days unknown to British Isles
• Unknown tucks in regularly on promo for this bean
• Plant unknown in modern times — British one
• Bean popular in East Asia
• Type of bean (Z, not S)
• Regularly tucks in, after chopper cut type of bean
• Small edible bean (z, not s)
• American's chipper with British island's type of beans
• Bean plant - chopper chopped British one